WM
William Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this William Mason across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1896), then head of a 6-person household.
Age 44
b. ~1896
Male
Head
Born: North Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Mason |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | North Carolina |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Steel Company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2040 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
| Occupation | Mechanic |
| Township / Ward | Baltimore |
| Est. Birth Year | ~1896 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Miriam Mason | Daughter | — | 13 | ~1927 |
| Barbara Mason | Daughter | — | 4 | ~1936 |
| William Mason | Head | — | 44 | ~1896 |
| Richard Mason | Son | — | 9 | ~1931 |
| Alexander Mason | Son | — | 16 | ~1924 |
| Miriam Mason | Spouse | — | 39 | ~1901 |
Census Appearances
1920
Baltimore, Maryland
Other, age 32
Baltimore, Maryland · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | William |
| Relationship to Head | lodger |
| Sex | M |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | North Carolina |
| Father's Birthplace | United States |
| Mother's Birthplace | United States |
| Occupation | Laborer |
| Industry | General |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
1930
Baltimore, Maryland
Other, age 37
Baltimore, Maryland · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | William |
| Relationship to Head | nephew |
| Sex | M |
| Color / Race | Black |
| Age | 37 |
| Marital Status | Married |
| Birthplace | North Carolina |
| Age at First Marriage | 24 |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | North Carolina |
| Occupation | laborer |
| Industry | building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
1940
Baltimore-City-County, Maryland
Head, age 44
Baltimore-City-County, Maryland · implied b. ~1896 — 6 household members
| Surname | Mason |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | North Carolina |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Occupation | Mechanic |
| Industry | Steel Company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2040 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links William Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mason
Head · 1940 · age 44 · b. ~1896 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01538-00305)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Letz | 13 | Son | — | Jugoslavia |
| 42 | Elizabeth Letz | 11 | Daughter | — | Pennsylvania |
| 43 | Thomas J. Baier | 28 | Head | Plate Inspector | Maryland |
| 44 | Viola V. Baier | 27 | Wife | — | Maryland |
| 45 | James C. Gallagher | 11 | Son | — | Maryland |
| 46 | Arthur J. Gallagher | 10 | Stepson | — | Maryland |
| 47 | Anthony Gallagher | 8 | Stepson | — | Maryland |
| 48 | William H. Mason THIS PERSON | 44 | Head | Mechanic | North Carolina |
| 49 | Miriam B. Mason | 39 | Wife | — | Georgia |
| 50 | Alexander H. Mason | 16 | Son | — | North Carolina |
| 51 | Miriam F. Mason | 13 | Daughter | — | North Carolina |
| 52 | Richard J. Mason | 9 | Son | — | New Jersey |
| 53 | Barbara F. Mason | 4 | Daughter | — | Maryland |
| 54 | Charles E. Ruby | 33 | Head | Strip Feeder | Pennsylvania |
| 55 | Mary U. Ruby | 26 | Wife | — | Georgia |
| 56 | Betty L. Long | 10 | Stepdaughter | — | Maryland |
| 57 | Paul Weick | 60 | Head | Captain | Germany |
| 58 | Lottie Weick | 50 | Wife | — | Germany |
| 59 | Claude M. Frye | 27 | Head | Catcher | Virginia |
| 60 | Mary E. Frye | 34 | Wife | — | Ohio |
| 61 | Norma J. Frye | 5 | Daughter | — | Maryland |
| 62 | Leonard Rieger | 34 | Head | Pattern Maker | Germany |
| 63 | Marguerite Rieger | 37 | Wife | — | Germany |
| 64 | Alice C. Reed | 34 | Head | Chauffeur | Maryland |
| 65 | Marie E. Reed | 35 | Wife | — | Maryland |
| 66 | Melvin L. Reed | 10 | Son | — | Maryland |
| 67 | Raymond Cecil | 22 | Head | Crane Operator | Kentucky |
| 68 | Phyllis Cecil | 18 | Wife | — | Virginia |
| 69 | Theodore Bieger | 30 | Head | Manager | Maryland |
| 70 | Pearl V. Bieger | 33 | Wife | — | Maryland |
| 71 | Stanley G. Carter | 22 | Brother-in-law | Carpenter Helper | Maryland |
| 72 | David E. Carter | 16 | Brother-in-law | — | Maryland |
| 73 | Patrick O'Connor | 24 | Head | Tally Clerk | Maryland |
| 74 | Pearl O'Connor | 22 | Wife | Assister | Ohio |
| 75 | Samuel J. Fisher | 31 | Head | Clerk | Pennsylvania |
| 76 | Harriett Fisher | 29 | Wife | — | Pennsylvania |
| 77 | Lois E. Fisher | 3 | Daughter | — | Pennsylvania |
| 78 | James Quicci | 39 | Head | Electric Welder | Italy |
| 79 | Josephine Quicci | 26 | Wife | — | Pennsylvania |
| 80 | Elsie Quicci | 10 | Daughter | — | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)